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Egg Lab Report

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Unit 1: The Cell                       Egg Lab Report

       Question        Will an unshelled egg increase or decrease in mass after being placed overnight in
                       corn syrup or water?
                       Formulate two hypotheses: one for putting an egg in water, the other for putting an
                       egg in corn syrup. (Formulate means “create”.)

                       1.



      Hypothesis

                       2.




             IV                                             DV


       Constants                                         Control                             None
                                                         Group
     Materials:                   Methods/Procedures:
     Eggs, Triple-Beam Balance, DAY 1 – Pre-Acetic Acid:
     Acetic Acid, Corn Syrup,     1. Observe each egg. Record your observations in Data Table 2.
                                  2. Calculate the mass of each egg. Record this mass in Data Table 1.
     Water                        3. Label one beaker A and one beaker B. Put one egg in each.
                                  4. Add enough acetic acid to the beaker so that you are completely covering
                                     the egg.
                                  5. In Data Table 2, record detailed observations of the eggs.

                                  DAY 2 – Post Acetic Acid:
     Safety methods to            6. Pour out all of the acetic acid and find the mass of each egg again. Be very
                                     gentle. Record your measurements in Data Table 1.
     follow:                      7. Make detailed observations of your eggs. (Consider any changes that have
     ____________________            occurred.) Record your observations in Data Table 2.
                                  8. Completely cover Egg A with distilled water. Make observations of both the
     ____________________            egg and the material it is submerged in. Record your observations in Data
                                     Table 2.
     ____________________         9. Completely cover Egg B with corn syrup. Make observations of the egg and
     ____________________            the material that it is submerged in. Record your observations in Data Table
                                     2.
     ____________________
                                  DAY 3 – Post Water/Syrup:
     ____________________
                                  10. Pour off the water and the syrup and find the mass of each egg again.
                                      Handle the eggs carefully. Record your measurements in Data Table 1 and
                                      your observations in Data Table 2.
                                  11. Make observations of what the eggs look like after sitting in the water and
                                      syrup overnight. Observe both the egg and the substance that it is in.
                                      Record your observations in Data Table 2.
Data:
DATA TABLE 1: Mass (10 points)
                              Mass of Egg A (g)                               Mass of Egg B (g)
                                 (in water)                                    (in corn syrup)
                    (Mass of Beaker A + Egg A) - Mass of Beaker A   (Mass of Beaker B + Egg B) - Mass of Beaker B

                    Mass of Beaker A: ________________________      Mass of Beaker B: ________________________



  Pre-Acetic Acid
      (Day 1)


 Post Acetic Acid
     (Day 2)


 Post Water/Syrup
      (Day 3)



DATA TABLE 2: Observations (10 points)
                           Observations of Egg A                           Observations of Egg B
                                (in water)                                    (in corn syrup)




  Pre-Acetic Acid
      (Day 1)




 Post Acetic Acid
     (Day 2)




 Post Water/Syrup
      (Day 3)
Questions / Conclusions: (10 points each)
Answer the following post-lab questions in complete sentences. (Restate the question.):
1. Evaluate your experiment. What parts of your experiment went well? What parts of the experiment
did not go well? Why? (Evaluate means “judge.”)




2. Identify and explain two sources of experimental error in this experiment. (What went wrong that
   could have messed up your results?) (Explain means “tell me how.”)




3. Describe two ways you can improve this experiment. (If you can’t think of any, ask yourself: how
   could you fix the experimental errors you discussed above?) (Describe means “tell me all about.”)




                                                              MORE QUESTIONS ON THE BACK! 
4. What is a follow-up experiment you could do? Make sure to describe the IV, DV, and constants.




5. What was your hypothesis for the egg in the water? Was it right? Support your answer. (Support
   means “back up your answer with details.”)




6. What was your hypothesis for the egg in the corn syrup? Was it right? Support your answer.




7. Was the corn syrup hypertonic/hypotonic/isotonic? Was the water hypertonic/hypotonic/isotonic?
   Explain how you know.

				
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posted:11/30/2011
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